Dreams involving ex-partners can often reflect unresolved feelings or thoughts about past relationships. In your case, seeing your ex as a friend in your house suggests that you may be seeking closure or understanding about your past with her. The fact that she had a different face could indicate that you are projecting qualities from other people onto her, or that you are trying to see your past relationship from a new perspective.

Talking about why you broke up in the dream signifies a desire to express feelings or thoughts that you may not have had the chance to communicate in real life. The smiling aspect of her response may reflect your hope for reconciliation or peace regarding the situation.

This dream could be an opportunity for you to reflect on what you learned from that relationship, how it affects you now, and what you truly desire moving forward. Consider whether there are lessons or emotions from this past relationship that you need to address in your waking life. It might also be helpful to think about what qualities you value in relationships as you move forward.